National Public Safety Information Bureau

Press Releases

Helping Airborne Public Safety Find Its Targets

Best use of the RHOTHETA RT-600-L airborne RDF by public safety involved in stolen property recovery and search-and-rescue missions

Ft Lauderdale - Florida, June 27, 2019

Public safety aviation units require ever more sophisticated tools to engage stolen property recovery and rescue missions.

Introducing the RT-600-L

RHOTHETA offers a small form factor, DO160, 4.4lbs, self-contained DF sensor, consisting of an antenna unit (AU) with built in DF switching, wideband V/UHF receiver and CPU electronics.

Designed to perform tasks specific to the needs of US law enforcement, its small size and low power consumption make it perfect for aircraft big and small, fixed or rotary winged, as well as drones. Covering from 118MHz to 470MHz, it detects and tracks AM, FM, PM and CW transmissions. The RT-600-L is operated from a 3.3in display-control unit (DCU) or from the HMI of a digital mapping system.

In the hands of well-trained operators, a digital mapping system like the AeroComputers UC-6000 / UltiChart, or the Churchill Navigation Augmented Reality System makes the time in the air more productive and mission-focused.

The RT-600-L integrates with these mapping systems supporting capabilities such as:

• Dynamic target (beacon, transmitter) information is overlaid on map

• Each LOB (line-of-bearing) is labeled with VLU or beacon ID

• Triangulation of two or more LOBs

• Depiction of target position

• DF info can be displayed on map mode or augmented reality video mode

• Route guidance to target position

• RT-600-L sensor status and data

Here is how a TFO explained operating the RT-600-L from the digital mapping system:

“Our typical track will be directly off the nose and as we get passage, I’ll touch the screen to mark the spot on the screen. We’ll remember which way we got passage (left or right side of the aircraft) and then next fly it at 90 degrees and mark the screen when we get passage. Again remembering which side, we get passage and then focus on that quadrant. Usually if we’re at 2500’ or so we’ll be at 90 percent signal or better if the vehicle is out in the open. If we get 90-70 percent bouncing, then the vehicle is in a garage, under a car port or up against a building giving a reflection. Using this method, we can normally find a vehicle within 5-10 minutes.”

Why use the RT-600-L?

Because it is an affordable multi-band multi-mission system capable of enhancing air units recovery and rescue missions, while saving critical panel and antenna space. Single-mission DFs force agencies to install multiple systems. Another advantage is its low price-performance ratio, and low overall installation, training and maintenance costs, proven over time by the hundreds of units in operation with Civil Air Patrol, Texas Department of Public Safety, California Highway Patrol and San Bernardino Sheriff Office, just to name a few agencies that are pleased with the RT-600.

As Public Safety agencies continue to target digitalization, it should be noted that the RT-600-L can be installed with or without the RHOTHETA DCU, ultimately relying on the DF monitoring and control functionality implemented in the mapping system. Constant (or continuous) development of digital mission systems will increasingly allow the removal of sensor-specific controllers from the instrument panel, saving space and optimizing sensor operation. RHOTHETA is committed to support developers in achieving these goals. For more detailed info on this press release click here. Or contact RHOTHETA International at (954)495-8700 / 


RHOTHETA International